The Data Import Wizard is a tool that allows you to import data for standard and custom objects, including person accounts, into Salesforce. You can access it from the Setup menu and use it to import up to 50,000 records at a time. You can also use it to update, upsert, or delete existing records. The Data Import Wizard can help you match your data with Salesforce fields, prevent duplicates, and run import jobs in the background. Reference: https://help.salesforce.com/s/articleView?id=sf.data_importer.htm&type=5